Concordance on the recording of cancer in the Saskatchewan cancer agency registry, hospital charts and death registrations

Accurate and complete registries are an important source of knowledge about cancer. The concordance of the recording of neoplasms in the Saskatchewan cancer registry; with that in hospital charts and death registrations was e valuated for 368 patients. The agreement between registry and hospital char ts or death registrations was excellent (kappa: 0.93; 95% confidence interv al: 0.89, 0.97), with 91.3% of those with cancer having the same neoplasm r ecorded in their charr or death registration as in the registry. There was only one patient whose hospital chart indicated cancer who was not in the; registry and one apparent major discrepancy relating to the cancer site, wh ich was due ro, the recording of the primary site in the registry and a sec ondary in the hospital chart. Although based on a relatively small number : of patients, these results suggest a high degree of consistency between can cer registry, hospital charts and death registrations in Saskatchewan.